If Klein was the first to see this, Strauss shows us that he was not the only one who arrived at a similar conclusion.We can resolve the forgetfulness of being by rummaging around the lost-and-found.
Heidegger was concerned with the question of Being. In a work by that title Heidegger reminds us the “Being is an umbrella which the forgetfulness of a professor of philosophy has left somewhere.” That above all “philosophy is ontology” was learned from Heidegger by Kurt Riezler.